SU1660025A1 - DEVICE FOR THE FORMATION OF COMMANDS OF TELEVISION - Google Patents

Description

The invention relates to telemechanics, in particular to telemechanics systems for security alarms, and is intended to generate telecontrol commands by which objects are switched on (armed) or switched off (disarmed). A distinctive feature of the device is the memorization and transmission of not only telecontrol commands given in the current period of time, but also all previously given commands. The aim of the invention is to increase the information content of the device. The device ensures automatic correction of the command receiver if for any reason, for example due to interference in the communication channel, distortions of information packets occur. The device comprises control switch blocks 1, multiplexers 6, 7, counters 8, 9, 13, switch 9, memory element block 10, AND elements 18-21, triggers 14-16, generator 17, OR elements 22, 23, delay element 24. 1 fig.

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The invention relates to telemetry systems, specifically security alarm systems, and enables the transmission of remote control commands such as "Arm the object" or "Disarm the object." A distinctive feature of such systems is the need to remember all previously transmitted commands and confirm them in each subsequent information cycle.

The purpose of the invention is to increase the information content of the device, ensured by storing in each new information cycle all commands sent previously, and including them in information messages during subsequent transmissions of remote control commands.

The drawing shows a structural diagram of the device.

The device for generating remote control commands contains a block 1 of control keys consisting of nodes 2-4 for generating an address (in addition, nodes 2-4 are intended for setting one of two types of the command being sent, for example, command 1 "Turn on" ("Arm the object") or command 2 "Disable" ("Disarm the object"). To process signals from block 1, block 5 of converters of parallel codes of the object address coordinates into serial ones is used. Block 5 contains multiplexers 6 and 7 and counters 8 and 9. To store the commands being sent, block 10 of memory elements is used; the nodes for processing remote control commands contain a switch 11, a counter 12 (the number of main digits of which is selected equal to the sum of the number of digits in counters 8 and 9, the number of additional digits is two), a counter 13, triggers 14-16, a generator 17, clock pulse elements AND 18-21, elements OR 22,23, delay elements 24 and an element EXCLUSIVE OR 25. Nodes 2-4 contain restrictive elements 26.1-p, keys 27.1-p.

The device works as follows.

When any command is sent, nodes 2 and 3 generate address signals for the selected control object. For a large number of objects, it is advisable to split the address into several coordinates. For example, if all objects are divided into groups, two address coordinates are generated: the group number and the object number within the group. It is possible, in principle, to split remote control objects to generate any number of address coordinates; however, in the presented embodiment of the device, a separation of objects is adopted.

remote control into groups with the formation of two coordinates. In accordance with this, block 1 includes separate nodes 2 and 3. The number of keys in nodes 2 and 3 can be arbitrary; in the given implementation of the device, the number of groups and the number of telecontrol objects in a group are adopted equal to eight, i.e., the total number of objects is adopted equal to sixty-four. Block 1 also contains node 4 for setting one of two types of the given command, for example, "Turn on" or "Turn off the object";"Arm the object" or "Disarm it". In each of the nodes 2, 3 and 4, for each of the generated signals, the drawing shows the use of an normally open contact 27, connected in series with a limiting element 26 between the poles of the power source + and _Pit and - 1) Pit. Thus, when any key 27 is moved to the working position, a signal "1" is generated at the output of the signal generation chain - the midpoint of the connection of the resistor and the key contact. Note that the device can also use normally-open contacts of the switches, which can be accomplished by simply reversing the power supply bus connections. Signals from nodes 2 and 3 are fed to block 5. Parallel signals from groups of nodes 2 and 3 are fed to the first group of information inputs of the corresponding multiplexer 6 or 7. Code signals from counters 8 and 9 are fed to the second group of address signal inputs of multiplexers 6 and 7. The signal from the input whose number corresponds to the code signal at the address inputs is sent to the outputs of multiplexers 6 and 7.

A control signal "0" is applied to the first input of counter 8, enabling the counting of pulse signals arriving at the second input of the counter. Counters 8 and 9 receive signals from the first output of generator 17, which generates sequences of varying frequencies at its outputs. The frequency of these signals must be high enough to minimize the delay time for transmitting the transmitted remote control command.

As clock pulses arrive at counters 8 and 9, the code combinations at the outputs of counters 8 and 9 change. Simultaneously, the numbers of the input signals passing to the outputs of multiplexers 6 and 7 change. When multiplexers 6 or 7 scan the input connected to the switched-on switch, a "1" signal is generated at their outputs. This signal, arriving at counter 8 or 9, blocks further changes to its state.

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Thus, when the signal "1" is formed at the output of the AND element 18, the code combinations recorded by counters 8 and 9 correspond to the coordinates of the address of the selected telecontrol object, and the total code combination on the output buses of the counters corresponds to the address of the telecontrol object. The signal "1" from the AND element 18 enables further processing of the command, which is made dependent on the presence of the signal "1" at the output of the OR element 2, i.e. on the selection of one of the two types of command. At the edge of the signal from the OR element 22, trigger 14 is set to "1", from which the enabling signal is fed to the control input of trigger 15, Trigger 15 is transferred to the state corresponding to the one set at its first input by the edge of the signal at its second input, and returns to the state "0" when signal "1" is applied to its third input. The signal at the first (ϋ) input of trigger 15 sets the value of the output Signal, set by the edge of the signal at the second (C) input; signal "1" on the third (K) input switches the trigger to the "0" state.

In the mode under consideration, the signal "1" at the second input of trigger 15 is generated by element AND 19 when signals "1" are supplied to its inputs from element AND 18 (when fixing the full address of the remote control object) and from the second output of counter 13. Two-digit counter 13 (similar to counters 8 and 9) is used to generate time-separated signals that strobe the recording or reading of information from block 10 and specify the address of one of the memory elements (the operation of block 10 is discussed below).

As follows from the above, when selecting the type of control command and fixing the full address of the object by the signal from counter 13, trigger 15 is set to "1", generating the "Start" signal informing the external control device that the device is ready to transmit a command. Simultaneously, the signal from trigger 15 switches switch 11 to the mode of transmitting signals from the first group of input signals to the output, i.e. signals from counters 8 and 9, and blocking the transmission of signals from the second group of input signals to the output, i.e. signals from the outputs of counter 12. The signal from trigger 15 also goes to the third input (control) of block 10, switching it to the mode of recording the signal in the cell, the address of which is determined by the output signals on the first (address) group of inputs of block 10, i.e. the output signals of the switch. The type of signal being recorded ("G" or "0")

is determined by the signal at the second (information) input of block 10, which is connected to the first output of node 4. Thus, when the "Enable" ("Arm") command is selected, the signal "1" is entered into the block's memory cell at the selected address, and when the "Disable" ("Disarm") command is selected, the signal "0" is entered. The strobe signal for entering data into block 10 is formed by delay element 24 and AND element 20 as follows. The control signal for trigger 15 is formed by the signal from counter 13, which is also fed to OR element 23, passing through AND element 20 to the strobe input of block 10. The delay element forms a signal delayed relative to the edge of the signal from counter 13, which, entering the inverting input of AND element 20, blocks its operation. At the same time, the signal from element 24 returns trigger 15 to the "O" state, which removes the blocking signal of element AND 20. Thus, at the falling edge of the signal from element 24, the working edge of the strobe signal is formed, according to which the given command is entered into block 8.

The device uses a method of sequentially sending remote control commands; block 10 is a RAM with serial data output.

Thus, when each new command is sent to block 10, information is re-entered only for the selected address, without destroying the information entered in previous stages. This allows for the transmission of not only the command currently sent to the receiving point, but also for the simultaneous repetition of command transmissions for all other objects. This increases the information content of the transmission, since in the event of random distortions, previously sent commands will be transmitted in each subsequent information cycle.

Let us consider the operation of the device in the mode of transmitting a serial code corresponding to the data recorded by block 10.

In response to the "Start" initiative signal, the external control device generates the "Enable" signal, which unlocks the operation of counter 12 and sets trigger 16 to "1". The signal from trigger 16 is sent to the "Ready" output and allows signals from block 10, which have passed through the EXCLUSIVE OR element 25, to pass to the "Information" output.

In the absence of a "1" signal from the trigger

15 switch 11 is set to pass on

output, i.e. to the first group of block inputs

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10, signals 1,,.6 from counter 12, and block 10 itself is set to reading mode (signal "O" from trigger 15 at the third input of the block

' 10).

Synchronization of the operation of counter 12 and block 10 is ensured by counter 13 and OR element 23. Each low-frequency signal at the second output of generator 17, the frequency of which is set equal to the frequency of transmission of remote control commands to the receiver, sets counter 13 to "0" and holds it in this state until the signal from generator 17 disappears. After this, counter 13 becomes sensitive to high-frequency clock signals arriving at its first input from the first output of generator 17. After fixing the first clock signal, signal "1" is formed at the first output of counter 13 and the output of OR element 23. The signal from OR element 23, having passed through AND element 20, blocks the sensitivity of block 10 to input signals. After a delay equal to one period of the signals at the first output of generator 17, a signal is generated at the second output of counter 13, and the block lock signal for block 10 is not removed. On the rising edge of the "1" signal at the second output of counter 13, counter 12 switches to the next code position, and counter 13 is locked by the signal at the second input, i.e., loses sensitivity to the clock signals from the generator. Consequently, at each falling edge of the clock signals coming from the second output of generator 17, the sensitivity of block 10 of memory elements is first locked, and then the address of the memory cell being polled is modified.

At the beginning of each successive period of the clock signals, when the counter 13 returns to the zero state, the blocking signal of block 10 from the AND element 20 is removed and block 10 transmits to the output the signal value stored in the cell, the address of which is indicated by the code signals of counter 12. The described operation of the device in the data reading mode from block 10 continues until the completion of scanning of all cells of block 10, i.e. until the appearance of signal "1" at output 7 of counter 12 (in the given embodiment of the device, the total number of digits of counters 8 and 9 is six and corresponds to the number of main digits of counter 12).

To increase the reliability of transmitted remote control commands, the device uses a method of retransmission with inversion of the information signals transmitted in the main message. Therefore, after all stored data are output from block 10

The "Ready" and "Information" signals are not removed from the information signals. Previously output signals are re-output from block 10 (the output code combinations of counter 12 are repeated), but at this stage, a "1" signal is generated at the output of counter 12, which is fed to the input of the EXCLUSIVE OR element 25. Element 25 operates as an inverter for signals arriving at its other input, i.e., those read from block 10. After the repeated output of the inerted information parcel is complete, a "1" signal is generated at the output of counter 12. This signal removes the "Ready" and "Information" signals, and in response from the external device, the "Enable" signal must be removed, thus completing the operating cycle of the device.

It should be noted that in the described device, information transfer is a consequence of a new command being issued, i.e., the device issuing a "Start" signal. However, the transmission of commands stored in block 10 can be implemented either by a signal from the timer or by an external transmission request signal. To do this, simply connect these signals to the "Enable" bus, regardless of the presence of the "Start" signal.

The described design of the device ensures that each new incoming remote control command is generated and stored in memory without destroying all previously transmitted and stored commands. This increases the device's information content, as commands distorted by interference can be automatically restored during each new transmission without complicating the command receiver.

Claims (1)

Claim A device for generating telecontrol commands containing a block of control keys, a block of memory elements, a clock pulse generator, the first output of which is connected to the first input of the first and second counters, the first output of the second counter is connected to the first address input of the first multiplexer, EXCLUSIVE OR, the first, second and third triggers., the output of the first trigger is connected to the first input of the second trigger, the switch, the output of the third trigger is the first output of the device, the first, second and third elements are And, the output of the second element AND is connected to the second input of the second trigger, the first element OR, characterized in that, in order to increase the information content, the third and fourth counters are introduced into it, the second multiplexer and the element OR, the element behind 1660025 ten support, the fourth element And, the control key block consists of the first and second nodes forming the address of the object and the command generation node, which are made on the restrictive elements and keys, the moving contacts of which are connected to the negative potential bus, the first conclusions of the restrictive elements are connected by a positive potential bus, the second pins of the restrictive elements are connected to the pins of the fixed contacts of the corresponding keys; the pins of the fixed contacts of the keys of the first and second nodes form The object addresses are connected to the corresponding information inputs of the first and second multiplexers, respectively; the fixed contacts of the keys of the command generation node are connected to the corresponding inputs of the first OR element, the fixed contact of the first key of the command generator node is connected to the first control input of the memory element block, connected to the first input of the second element And, the first output of the generator of clock pulses connected to the first input of the third counter, in second output to the second input of the first counter, the first output of which is connected to its third input, the first input of the second element OR, the fourth counter and the second input of the second element AND, the outputs of the first and second multiplexers are connected to the second inputs of the second and third counters respectively and respectively to the first and the second inputs of the first element And the second and third outputs of the second counter are connected to the corresponding address the inputs of the first multiplexer, the outputs of the third counter are connected to the corresponding address inputs of the second multiplexer, the outputs of the second and third counters are connected to the corresponding inputs of the first switch group, the outputs of which are connected to the information inputs of the memory element block, the second output of the first counter is connected to the second input of the second OR element, the output of which is connected to the first input of the third element And is the second output of the device, the output of the second trigger is the third output of the devices and connected to the switch input, the second control input of the memory unit and through the delay element to its third input and the second input of the third element And the second input of the fourth counter is combined with the first input of the third trigger and is the device input the inputs of the second group of switch, the output of the third element And is connected to the third control input of the block of memory elements, the output of which is connected to the first input of the element EXCLUSIVE IL the output of which is connected to the first input of the fourth element AND, the output of which is the fourth output of the device, the output of the third trigger is connected to the second input of the fourth element AND, the first and second control outputs of the fourth counter are connected to the second input of the EXCLUSIVE OR element and the third trigger, respectively, the output of the first element OR is connected to the second input of the first trigger.